Chuck.



G. HALVORSEN-PANDE.

CHUCK. APPLICATION IIILED IB'B.24, 1914.

Patented Oct. 27', 1914;.

2 $HEETS-SHEET 2.

j a v 1 v GUSTAV I-IALVORSEN-PANDE, OF CHICAGO, ILLINOIS,. ASSIGNOR 0F GATE-HALF ltFIQidh FRANCIS. J. CU'SHING, OF CHICAGO, ILLINOIS.

CHUCK.

Specification of Letters Patent.

Patent-ed Got. 2'7, 19141.

Application filed February 24, 1914. Serial No. 820,658.

To all whom it may concern: Be it known that I, GUSTAV HALvonsnN- PANDE, a citizen of the United States residing at Chicago, in the county of (look and State of Illinois, have invented certain new and useful Improvements in Chucks, of which the following is a specification.

My invention relates more particularly to means for utilizing the rotary movement 1mparted by the spindle for feeding the chuck, the rate of feed being under ready control by the hand of the-operator.

In the accompanying drawings and in the following specification, I disclose two preferred forms of my invention. In the simpler of these forms provision is made only for the manual control of the downward or working feed of the drill or tool. In the second form of the invention disclosed, provision is made for not only utilizing the rotation of the spindle for the downward working feed of the chuck but also for the ,reverse feed for lifting the tool from the work when it is finished or when for any reason it is desired to interrupt the work of the tool. These two forms of the invention are specifically described for the purpose 0 excmplification but it is to be understood that my invention is not limited by the disclosure but is set forth in the following claims in which Ihave endeavored to distinguish it from the prior art so far known to me without, however, relinquishingor abandoning any portionthereof.

In the accompanying drawings, Figure 1 is a vertical longitudinal section through the center of the simpler form of my invention. parts, however, being shown in elevation; Fig. 2 is a side elevation of one of the members thereof; Fig. 8 is a vertical central longitudinal section through one of the members which is shown in elevation in Fig. 1; Fig. 4 is a side elevation of a member shown in section in Fig. 1; Fig. 5 is a side elevation of another member. shown in section in Fig. 1; Figs. 6 and 7 are a side elevation and a transverse section respectively; the latter on the line 7-7 of Fi '6, of the clamping jawsforming a part 0 the tool; Fig. 8 is a central longitudinal section through the second excmplification of my invention, parts being shown in elevation; Fig. 9a transverse section upon the plane of the line 9-9 of Fig. 8 and Fig. 10 a section on the line 10 -10 of Fig. 8.

Each part is identified by the same symbol. of reference wherever it occurs in the several views.

Turning first to the simpler form of the invention shown in Figs. 1 to 7 inclusive, it

will be seen that the driving member 8 (Figs. 1 and 2)" comprises a. rotary circular head formed with a nut 9 and a threaded bore (see dotted lines Fig. 1) in which latter the spindle 11 of the screw press is fitted, the nut serving to hold the member against rotation when being screwed upon the spindle. A squared shank 12 18101111611 integral with the head 8 and when the tool isasscnibled has a sliding connection with a jawcarrier 13 which is formed with a longitudinal passage 14 also square in cross section to fit said shank. shank is cylindrical for a purpose which will appear. The bore of the jaw carrier terminates short of the lower end thereof. The jaws may be of any desired form and are shown as of an ordinary type and secured to the carrier in the'usual manner. For this purpose the latter is formed with an angular recess or channel 15 which receives the upper ends of the jaws 1G, 16 which are or may be suspended from a curved retainer 17 fitting in grooves 18 in the lower end of said jaw-carrier. By this means the jaws are loosely suspended so as to be capable of relative movement and. areretuined in channel 15 and forced together when it required to clamp a tool therein by a sleeve 19 internally threaded to engage a thread 20 upon the exterior of the jaw-carrier 13. At its lower end the bore of the sleeve 19 is contracted as at-QI to cooperate with the convex outer surfaces 22, 22 of the jaws so that when said sleeve 19 is fed upward with respect to the jaw-carrier it engages the exterior sur of the jaws and forces them togethen order to feed the sleeve 19 upwardly ,nf ith relation to the jaws and carrier it lbflftijlillgfll with an external bulbous enlargenie'nt 2 8 which may be grasped by the hand to prevent the rotation ofsaid sleeve, whereupon the continued rotation of the jaw-carrier by, the spindle and driving member causes the sleeve to be fed upward by reason of its threaded engagement with the jaw-carrier referred to above. This construction of clamping jaws and operating mocluinisni is, as stated above, old in the art and I make no claim thereto.

The lower end of the Elsi:

The provision for antornaticall g feeding the aw-carrier which constitutes the novel feature of soy im'ention will. now be de SE1 The upper end of the jaw-carrier enla engaging an interior thread upon a handle sleeve 25 which surrounds both the jawcarrier and the clamping sleeve 19. Ohviously the thread between the jaw carrier and the handle sleeve is right or left handed according to the direction which the chuck is to be turned. If it is to be turned as usual counterclockwisea right hand thread is required between the elements specified. 11", however, the spindle is to be turned. in a reverse direction the thread must be left handed. In the accinpanying drawings 1 have shown the thread as left handec. The direction of the r0tation will of course depend upon the direction of the cutting edge of the tool employed. The upper end of the sleeve 25 is provided with a pair of screws 26, 26 which extend inward and engage a groove 27 in the driving head 8 wherebylongitudinal movement between the parts is prevented but rotary movement allowed. The exterior of the sleeve 25 is formed to be readily grasped by the hand to prevent rotation and when so held the jaw-carrier l3 revolves with relation thereto and by reason of the threaded engagement between these parts is fed downward. Thus by preventing or retardingthe rotation of the hand sleeve the chuck with the tool clumped therein may be fed downward and the speed of feed may be regulated to a nicety.

The shank 12 as above stated is made cylindrical at its lower end 28, the length of the squared. portion being such that the nwcarrier is fed downward until the enlarged threaded portion t hereof reaches substau 'tially the end of the sleeve 25. When this occurs and the squared portion of the shank is clear of the bore 14: the driving member is free to revolve without turning the carrier so that further feeding operation ceases notwithstanding that the sleeve 25 may be still. held from rotati n. In fact when this point reacl'led rotation the carrier ceases altor. lihe c; c howsn 'er can be reinto engagement with the squared shank 12 by holding it stationary and re-' volvinr; the sleeveQS it being necessary of he anguiarly adjusted smon in which the shank 12 may to the po enter th llefer :he invention she may be rope; form as diet I scribed to prov ward feed of the drawal thereof from The jaws 16, 15 and ed and threaded as at 24-. the thread them into engagement with the tool are or may be the same in this form of the device the spindle 11 of the pressand is provided with a sleeve 30 having a cylindrical exterior fitted. over the squared shank and secured thereto for a purpose which will. presently appear. The sleeve is'forined with an internal flange 3'1 at its upper end upon which is formed or secured agear 32 which when the parts are assembled is journa ed upon the sleeve referred to above. The driving head is formed with an annular flange or lugs in which are mounted the studs or arbors 3%, shown as two in number, though more nii 'ht be employed. Upon said arhors are journaled planetary gears 35 which are in mesh with the gear 32 referred to above- The upper end. of the driving' member 8 is reduced and threaded zit--36 to receive a nut 3'? and a reversing sleeve 38 is formed with an inwardlj extending flange 39 which surrounds the neck of the extension 36 and is held against vertical movement between the lugs and nut 37 referred to above. Said sleeve is sle formed with an internal circular rack or-gear 40 which engages the planetarygears 35 for a purpose to be presently described. "The upper end of sleeve 25 is termed with an annular groove ll and sleeve 38 carries two or more screws the inner ends of which project'into said groove to prevent relative axial movement between the sleeves 25' and Vi hen the chuck is applied to the spindle o'f a drill press and the latter is revolved, if there is no intervention on the part of the operator the chuck and tool carried thereby are revolved as in or. inary drill press oper ations. V7 hen it is desired to feed the tool downward the sleeve 25 is grasped and held from rotation so that the rotary movement communicated by the drill spindle and drivng member to the jaw-carrier feeds the lation ter downward as described in connection" with the earlier-described form of the inven- In order to withdraw the drill or other tool from the Work when desired, it is only necessary to grasp the reversing sleeve leaving the sleeve 25 free to revolve. Vi hen this isdone the continued revolution of the driving member carrying with it the planetary gears35 causes the latter to roll upon internal gear 46- and to therebvrevolve the 32 carried. by the sleeve 25. By reason of the di'iierence diameters and numbers or teeth between the internal gear and the gear 32 the speed of the spindle is multiplied and the gear 32 and attached sleeve 25 driven in the same direction as but more rapidly than the driving member and the jaw-carrier. The result of this difference in speed is to cause such a relative rotation between the jaw-carrier and sleeve 25 as to cause the jaw-carrier to be fed upward by the threaded engagement between these elements. Obviously the speed of the upward feed is determined by the relative diameters of the gear 32 and the internal gear 40.

I claim:

1. A drill chuck comprising a jaw-carrier, a driving member adapted to be attached to the spindle of a drill, said driving member and jaw-carrier adapted and arranged for rotation together and for axial movement relative to each other, and asleeve journaled with respect to one of said elements and having a threaded engagement with the other, the thread being so pitched that by holding the sleeve stationary the jaw-carrier will be fed downward.

2. In a chuck, a driving member, a jawranrier, connections between the same whereby they rotate together but are movable axially with relation to each other, the ja wcarrying member having a threaded portion and a member provided with a thread en gaging the threaded portion of the jaw carrier and adapted to revolve with the jawcarrier or to be held stationary while the latter revolves.

3. In a chuck, a driving member, a jawcarrier having telescopic connections therewith, said jaw-carrying member havingalso a threaded portion, an internally threaded member engaging the threaded portion of the jaw-carrier'and adapted torevolve therewith or to be held stationary while the jawcarrier revolves.

4. In a chuck, a driving member having a shank, a jaw-carrier having a'bore to receive the shank and adapted tobe revolved by the latter but to have axial movement relative thereto, said jaw-carrier having also an exteriorly threaded portion, a member having an internally threaded portion engaging the exteriorly threaded portion of the jaw-carrying member and adapted to revolve with the latter or to be revolved relatively thereto. v 5. In a chuck, a driving member having a squared shank, a jaw-carrying member having an axial cavity squared in cross-section to receive said shank and an exteriorly threaded portion, an interiorly threaded sleeve engaging the threaded portion of the jaw-carrier, and connections between said sleeve and the driving member whereby rotary movement between the parts is per-' initted but axial movement preventedrti' I 6. In a chuck, a driving member, a 1aw: carrier engaging the same and revolved 'the connections between the two, however,

permitting axial adjustment, the jaw-can rier being formed with an exteriorly threaded portion, an internally threaded sleeve engaging said threaded portion of the jawcarrying member and revolubly suspended from the driving member.

8. In a chuck, a driving member having a squared shank with a reduced end, a jaw-- carrying member having an axial bore fitting upon the non-cylindrical portion of the shank, said jaw-carrierhaving an ex'tcriorly threaded portion, an internally threaded. sleeve engaging said cxterio'rly threaded portion. of the jaw-carrier and rotatably mounted upon the driving member but prevented from thereto.

9. In a chuck, a driving member adapted to be attached to a s1 iindle and having-an annularly grooved head and a squared. shank terminating in a cylindrical portion, a jawcarrying member having a squared axial bore adapted to receive said shank and formed with an exteriorly threaded portion,

. an interiorly threaded sleeve adapted toengage the threaded portion of the jawcarrying member and havin projections fitting within-the groove oft e driving member whereby rotation between the parts is permitted but relative axial movement prevented.

10: In a chuck, a driving member having a squared shank, a jaw-carrier having an -axial cavity adapted to receive and fit said shank and an exteriorly threaded portion,

said jaw-carrier also having a reduced pci tion likewise provided with an exterior thread, aws supported from the aW-carrier, a sleeve 19. interiorly. threaded to engage the reduced portion of the jaw-carrier and hav ing its interior diameter reduced the lower end to. cooperate with the jaws for forcing thesame together, a sleeve having an interior thread for engaging the first said threaded portion of the aw-carrier, said sleeve having a revolirble engagement with the driving member.

11. In'a,chnck,. a driving member, a jaw carrier. engaging the driving member and revolnble therewithv and axially movable with respect-thereto, the jaw carrier being provided with an" exterior thread, a handle member-having an interior thread engaging the thread on the jaw carrr' r. reversing axial movement relative sleeve and gearing between the reversing sleeve and handle member whereby by holding the reversing sleeve the handle member may be turned in the same direction as the driving member.

In a chuck, a driving member, a jaw carrier rotatable with said driving member but adjustable axially with respect thereto, said jaw-carrying member being formed with an exterior} thread, an interiorly threaded hand sleeve engaging a thread on the jaw carrier, a reversing sleeve revolubly mounted With respect to the hand sleeve and driving member, gearing intermediate said reversing sleeve and hand sleeve whereby when the reversing sleeve is held stationary the hand sleeve is revolved in the same direction as the driving member.

13. In a chuck, a driving member, a jaw carrier engaging and revoluble With said driving member but axially movable with relationthereto, said carrier havingan exterior thread, a hand sleeve interiorly threaded and engaging the thread on the jaW carrier, a reversing sleeve revolubly mounted with respect to the driving member and hand sleeve, an internal annular gear on the reversing sleeve, an exterior gear on the hand sleeve and gears between the two w by when'the reversing sleeve is held While the driving member is rotated, the hand sleeve Will be rotated in the same direction as the driving member but at a greater rate of speed.

let. In a chuck, a driving member, a jaw carrier keyed upon the same for axial movement with respect thereto, and having an en terior thread, a hand sleeve having an interior thread engaging the thread upon the jaw carrier, said sleeve also being formed with. a reduced portion, there being gear teeth upon said reduced portion, a reversing sleeve surroundin said reduced portion and having an interna gear formed thereon, and gears intermediate said internal and external gear and carried by said driving member, whereby rotation of the driving member relative to the reversing sleeve causesizhe hand sleeve to move in the same direction as said driving member but at a greater speed.

15, A chuck comprising a driving member having a head and a squared shank, a jaw carrier having an opening in ing said shank whereby provision is ma do for relative axial movement between the parts but rotative movement prevented, said jaw carrier being formed with an exteriorly threaded portion, a hand sleeve having an internal thread engaging the thread upon the jaW carrier and also reduced at one end and formed With a gear, tvvo or more planetary gears mounted upon the driving member and engaging the gear on the hand sleeve and a reversing sleeve connected. to said driving member and hand sleeve and having an interior gear engaging the gears upon the driving member.

GUSTAV HALVORSEN-PANDE.

Witnesses JOHN B. MACAULEY,

-ROBERT DOBBERMAN.

some! of this patent may be obtained for five cents each, by addressing the Commissioner of ratents,

' Washington, It 8. 

